Dc to dc power converter using synchronously switched switches

Abstract

A full bridge and half bridge dc-dc converter including a primary side having switching devices connected to a transformer, and a primary side controller, a secondary side including switching devices connected to a secondary side of the transformer, an inductor, and secondary side controller, a central control synchronizing the primary side controller and the secondary side controller, and a set of rules for controlling the primary side and secondary side switches such that a utilization rate exceeds fifty percent.

What is claimed is:  
     
       1. A half bridge dc-dc converter comprising: 
       a primary side, the primary side comprising:  
       a plurality of primary side switching devices comprising a first switching device and a second switching device, said first primary side switching device defining an A-side of the primary side and connected to a primary side of a transformer, said second primary side switching device defining a B-side of the primary side and connected to the primary side of the transformer;  
       and a primary side controller;  
       a secondary side, the secondary side comprising:  
       two secondary side switching devices, including a third and fourth switching device connected to a secondary side of the transformer,  
       an inductor, and  
       secondary side controller;  
       a central control, said central control synchronizing the primary side controller and the secondary side controller to execute a plurality of switching device timing relationship rules once per cycle;  
       said rules comprising:  
       first primary side switch ON, third secondary side switch ON, second primary side switch OFF, fourth secondary side switch OFF;  
       first primary side switch OFF, second primary side switch OFF, third secondary side switch ON, fourth secondary side switch ON;  
       first primary side switch OFF, third secondary side switch OFF, fourth secondary side switch ON;  
       first primary side switch OFF, third secondary side switch OFF, second primary side switch ON, fourth secondary side switch ON;  
       first primary side switch OFF, second primary side switch OFF, third secondary side switch OFF, fourth secondary side switch ON;  
       first primary side switch OFF, second primary side switch OFF, third secondary side switch ON, fourth secondary side switch ON;  
       first primary side switch OFF, second primary side switch OFF, fourth secondary side switch OFF, third secondary side switch ON;  
       repeat.  
     
     
       2. A half bridge dc-dc converter according to claim  1  wherein each of the plurality of primary side switching devices and each of the plurality of secondary side switching devices are metal oxide semi-conductor field effect transistors (MOSFETs). 
     
     
       3. A full bridge dc-dc converter comprising: 
       a transformer having a primary side winding and a secondary side winding, said secondary winding side having a center tap, said center tap connected to provide an output dc power connection;  
       a primary side, the primary side comprising:  
       a plurality of primary side switching devices including a first, a second, a third, and a fourth, switching devices, said first and second primary side switching device defining an A-side of the primary side and connected to a primary side of a transformer, said third and fourth primary side switching device defining a B-side of the primary side and connected to the primary side of the transformer;  
       and a primary side controller;  
       a secondary side, the secondary side comprising:  
       two secondary side switching devices including a fifth and a sixth switching device, said fifth and sixth switching device connected to a secondary side of the transformer,  
       an inductor, and  
       secondary side controller;  
       a central control, said central control synchronizing the primary side controller and the secondary side controller; and said central control storing a plurality of switching device timing relationship rules, said plurality of switching device timing relationship rules executing once per cycle;  
       said rules comprising:  
       first primary side switch, fourth primary side switch, fifth secondary side switch on and second primary side switch, third primary side switch sixth secondary side switch off;  
       first primary side switch, second primary side switch, third primary side switch, fourth primary side switch, sixth secondary side switch off and fifth secondary side switch on;  
       first primary side switch, second primary side switch, third primary side switch, fourth primary side switch off and fifth secondary side switch, sixth secondary side switch on;  
       first primary side switch, second primary side switch, third primary side switch, fourth primary side switch, fifth secondary side switch off and sixth secondary side switch on;  
       second primary side switch, third primary side switch, sixth secondary side switch on and first primary side switch, fourth primary side switch, fifth secondary side switch off;  
       first primary side switch, second primary side switch, third primary side switch, fourth primary side switch, fifth secondary side switch off and sixth secondary side switch on; and  
       first primary side switch, second primary side switch, third primary side switch, fourth primary side switch off and fifth secondary side switch, sixth secondary side switch on.  
     
     
       4. A full bridge dc-dc converter comprising: 
       a transformer having a primary side winding and a secondary side winding, said secondary winding side having a center tap, said center tap connected to provide an output dc power connection;  
       a primary side, the primary side comprising:  
       a plurality of primary side switching devices including a first a second a third and a fourth, switching devices, said first and second primary side switching device defining an A-side of the primary side and connected to a primary side of a transformer, said third and fourth primary side switching device defining a B-side of the primary side and connected to the primary side of the transformer;  
       and a primary side controller;  
       a secondary side, the secondary side comprising:  
       two secondary side switching devices including a fifth and a sixth switching device, said fifth and sixth switching device connected to a secondary side of the transformer,  
       an inductor, and  
       secondary side controller;  
       a central control, said central control synchronizing the primary side controller and the secondary side controller, said central control storing a plurality of switching device timing relationship rules, said plurality of switching device timing relationship rules executing once per cycle;  
       said rules comprising:  
       first primary side switch, fourth primary side switch fifth secondary side switch on, second primary side switch third primary side switch sixth secondary side switch off;  
       first primary side switch, second primary side switch, third primary side switch, sixth secondary side switch off, fourth primary side switch, fifth secondary side switch on;  
       first primary side switch, second primary side switch off, third primary side switch, fourth primary side switch, fifth secondary side switch, sixth secondary side switch on;  
       first primary side switch, second primary side switch, fourth primary side switch, fifth secondary side switch off, third primary side switch, sixth secondary side switch on;  
       second primary side switch, third primary side switch, sixth secondary side switch on, first primary side switch, fourth primary side switch, fifth secondary side switch off;  
       first primary side switch, second primary side switch, fourth primary side switch, fifth secondary side switch off, third primary side switch, sixth secondary side switch on; and  
       first primary side switch, second primary side switch off, third primary side switch, fourth primary side switch, fifth secondary side switch, sixth secondary side switch on.  
     
     
       5. A full bridge dc-dc converter comprising: 
       a primary side, the primary side comprising:  
       a plurality of primary side switching devices including a first, a second, a third, and a fourth, switching devices, said first and second primary side switching device defining an A-side of the primary side and connected to a primary side of a transformer, said third and fourth primary side switching device defining a B-side of the primary side and connected to the primary side of the transformer;  
       and a primary side controller;  
       a secondary side, the secondary side comprising:  
       a plurality of secondary side switching devices including a fifth and a sixth switching device, said fifth and sixth switching device connected to a secondary side of the transformer,  
       an inductor, and  
       secondary side controller;  
       a central control, said central control synchronizing the primary side controller and the secondary side controller through storing a plurality of switching device timing relationship rules, said plurality of switching device timing relationship rules executing once per cycle;  
       said rules comprising:  
       first primary side switch, fourth primary side switch, fifth secondary side switch on and second primary side switch, third primary side switch, sixth secondary side switch off;  
       first primary side switch, second primary side switch, third primary side switch, fourth primary side switch, sixth secondary side switch off and fifth secondary side switch on;  
       first primary side switch, second primary side switch, third primary side switch, fourth primary side switch off and fifth secondary side switch, sixth secondary side switch on;  
       first primary side switch, second primary side switch, third primary side switch, fourth primary side switch, fifth secondary side switch off and sixth secondary side switch on;  
       second primary side switch, third primary side switch, sixth secondary side switch on and first primary side switch, fourth primary side switch, fifth secondary side switch off;  
       first primary side switch, second primary side switch, third primary side switch, fourth primary side switch, fifth secondary side switch off and sixth secondary side switch on; and  
       first primary side switch, second primary side switch, third primary side switch, fourth primary side switch off and fifth secondary side switch, sixth secondary side switch on.  
     
     
       6. A full bridge dc-dc converter comprising: 
       a primary side, the primary side comprising:  
       a plurality of primary side switching devices including a first, a second, a third, and a fourth, switching devices, said first and second primary side switching device defining an A-side of the primary side and connected to a primary side of a transformer, said third and fourth primary side switching device defining a B-side of the primary side and connected to the primary side of the transformer;  
       and a primary side controller;  
       a secondary side, the secondary side comprising:  
       a plurality of secondary side switching devices including a fifth and a sixth switching device, said fifth and sixth switching device connected to a secondary side of the transformer,  
       an inductor, and  
       secondary side controller;  
       a central control, said central control synchronizing the primary side controller and the secondary side controller through storing a plurality of switching device timing relationship rules, said plurality of switching device timing relationship rules executing once per cycle;  
       said rules comprising:  
       first primary side switch, fourth primary side switch, fifth secondary side switch on, second primary side switch, third primary side switch, sixth secondary side switch off;  
       first primary side switch, second primary side switch, third primary side switch, sixth secondary side switch off, fourth primary side switch, fifth secondary side switch on;  
       first primary side switch, second primary side switch off, third primary side switch, fourth primary side switch, fifth secondary side switch, sixth secondary side switch on;  
       first primary side switch, second primary side switch, fourth primary side switch, fifth secondary side switch off, third primary side switch, sixth secondary side switch on;  
       second primary side switch, third primary side switch, sixth secondary side switch on, first primary side switch, fourth primary side switch, fifth secondary side switch off;  
       first primary side switch, second primary side switch, fourth primary side switch, fifth secondary side switch off, third primary side switch, sixth secondary side switch on; and  
       first primary side switch, second primary side switch off, third primary side switch, fourth primary side switch, fifth secondary side switch, sixth secondary side switch on.  
     
     
       7. A half bridge dc-dc converter comprising: 
       a primary side, the primary side comprising:  
       a plurality of primary side switching devices, a first primary side switching device defining an A-side of the primary side and connected to a primary side of a transformer, a second primary side switching device defining a B-side of the primary side and connected to the primary side of the transformer;  
       and a primary side controller;  
       a secondary side, the secondary side comprising:  
       a plurality of secondary side switching devices, including a third and fourth switching device connected to a secondary side of the transformer,  
       an inductor, and  
       secondary side controller;  
       a central control, said central control synchronizing the primary side controller and the secondary side controller to store a plurality of switching device timing relationship rules, said plurality of switching device timing relationship rules executing once per cycle;  
       said rules comprising:  
       first primary side switch ON, third secondary side switch ON, second primary side switch OFF, fourth secondary side switch OFF;  
       first primary side switch OFF, second primary side switch OFF, fourth secondary side switch OFF, third secondary side switch ON;  
       first primary side switch OFF, second primary side switch OFF, third secondary side switch ON fourth secondary side switch ON;  
       first primary side switch OFF, third secondary primary side switch OFF, fourth secondary side switch ON fourth secondary side switch ON;  
       first primary side switch OFF, third secondary side switch OFF, second primary side switch ON, fourth secondary side switch ON;  
       first primary side switch OFF, second primary side switch OFF, third secondary side switch OFF, fourth secondary side switch ON;  
       first primary side switch OFF, second primary side switch OFF, third secondary side switch ON; fourth secondary side switch ON;  
       first primary side switch OFF, second primary side switch OFF, fourth secondary side switch OFF, third secondary side switch ON;  
       repeat.